Nailing attachment for mechanical hammers



jan. 225, @929, l Y 1,699,519

A. BROWN NAILING ATTACHMENT FOR MECHANICAL HAHMERF Filed Jan. 24, 1927 'man' .1....2-2, 1929. j y 1,699,519

- UfNITEDsTA-'rss PVATNT OFFICE.I

Anrosv BROWN, or wILMmGroN, DELAWARE, AssIeNoa fro AMERICAN CAR AND VrouNnnY COMPANY, or NEW Yonx, N. Y., A ConPon'ArroN oENnvv` JERSEY.

' NAILING A'rTAcHNENT ron MECHANICAL nAmrEns.

Application med January 24, 1927. Serial No;` 163,049.

Reference is had to the accompanying magnetized nail set or plunger for holding drawings which illustrate the preferred form the nail at a desired angle to the surface in'- of theinvention, though`it is to be understood which it is being driven, and thereby reduce that the invention is not limited tothe exact bending of the nails to a minimum. details of construction shown anddescribed, Still another object of this invention is to 65 as it'is obvious thatvarious modifications Vprovide a reciprocating hammer nailing atthereof within the scope ofthe claims will octachment wherein vibration is reduced toI a l cur to persons skilled in the art. minimum.

- In the drawings: l Another object resides in the provision of Fig. 1 is a vertlcal sectional vlew of my anailing attachment that may be associated 00 nailing attachment associated with a pneuwith any conventional pneumatic or electric matic hammer, and illustrating the same in reciprocating hammer, and which embodies position for setting a nail in a counter-bored a plurality of resiliently cushioned telesurface; l scopic members serving to permit the full Fig. 2 is a transverse sectional v1ew taken length of the nail to be driven into an object, 65 on line 2 2 of Fig. 1; to exert pressure against the object, and to Fig. 3 is asimilar view taken on line 3- eliminate vibration lncident tothe 'operation of Fig. 1; of the reciprocating hammer.

' Fig. 4 is a fragmentary vertical'sectional. Referring to the invention in detail,` a con- View of the attachment in aposition to set ventional pneumatic hammer barrelA is desig- 70 a nail in a Hush surface; and nated at 5, while the hammer therefor is in- Fig. 5 is a vertical sectional view of a modidicated at l Y -fcation ofthe invention, the la er being This attachment'comprises a sleeve 7,'havadapted for association with an electric haming .one end threadedly engaged with the` mer. A lower end of tliebarrel 5 as shown at 8. This 75 My invention relates `to mechanical ham.-l sleeve 7 has secured theretoa casing formed mers, and more particularly to a nailing atof cushioned telescopic tubular sections 9 tachment therefor. and 11,' the tube 9 being of smaller diameter Itis well known in the art to provide pneuthan the sleeve 7 and being secured to the 30 matic or pojwor driven hammers for the pur. v sleeve 7 as shown at 10. The tubular section 80 pose of driving nails or the like into suitable 1 1 is of smaller diameter than the tubular secplanln'ng, butin the use of the ordinary and t1on 9, and the adJacent ends of the sections usual power hammer, it is necessary to inset 9 and 11 are provided with co-acting stop the nail heads by an'independent operation; flanges 12 and 12 respectively; these stop usually anoperator would employ a separate flanges functioning todi-mit lthe outward 85 nail set and manually inset the nails. It will 'movement of thetube 11 be apparent that by such a method the nails Y A nail guide 13 is provided for guiding the are not uniformly inset and to eliminate'the nail while being set into the plank or other double operation just mentioned, as well as object. This nail guide 13 is of Cylindrical 40 to provide for uniformly insetting the nails, formation and is arranged c'rlcentrically 90 the present invention has been devised, and within the tube 11, and the upper end of the one object of the present in'vention therefore nailguide 13 extends into the'tube 9 a subcontemplates a single tool which will drive stantil distance; said upper end forming a nail or the like to the desired depth, or in an abutment designated at 13 for a purpose 1 other Words, to a depth such that the head is to 4be hereafter described. To support the 95 inset, in a single operation. This is in connail guide within the tubes a. centering tradistinction to the before=mentioned double vwasher 14 rests upon the flange 12a of operation which requires'the separate and inthe tube 11, and through which. the upper dependent manual msett'ing of the nails. end of the guide 13 extends. An annular g Further, the invention contemplates a 'vilange 15 is formed upon the. nail guide ad- 100'" flange 16 formed upon the lower end of the tube 11.

Arranged concentrically in the sleeve 7 and tubes 9 and 11 is a magnetic nail set or driving element 17 provided with a circular stop collar 18 at its upper end, yand formed with this stop collar 18 is a plunger 19 which projects into the barrel and is arranged to be engaged by the hammer element 6. The nail set or striking element is circular in cross section, and projects into the nail guide for reciprocatory movement therein and is formed with a nail head seat 20 upon its lower or strikingI end, and when a nail is placed in the nai guide it will be drawn against the nail head seat 20EL by the magnetic attraction of the nailing element. A bushing 2() is tightly received in the lowerend of the barrel 5, and receives the plunger 19. As illustrated in Fig i I25 is prgvided in the bushing, through whiehf 1, the 'stop collar 18 is disposed below the bushing 20 and abuts the same upon the return movement of the nail set, to limit the movement of the latter in one direction.-

As heretofore -mentioned, this invention contemplatesneans` for governing the. depth into which the nail is inset in a plank or the like, and to this end an adjustable stop 21 is provided. vThis stop 21 is in the form of an exteriorly threaded bushing 22 capable of rl'o/ngitudinal adjustment in the threaded end 23 of the tube 9. Recesses 24 are provided in the upper face of this bushing, arranged to be engaged by a suitable tool for the purpose of adjusting the bushing towards or away from the stop 18. A central opening the nailing element-or set slidably exten As her 'nafter describedv it can be seen that the de th to which the nail is inset, is governed y the adjustment of the bushing 22 towards or away 'from the stop 18.

Arranged in each of the tubes'9 and 11 is a coil spring 26 and 27, the former encircling the nail set 17 and bearing against the underface of the bushing 22 at one end and having its other end engaged with the washer 14.

The coil spring 27 encircles the cylindricalguide 13, and has one end engaging the underface of the Washer-14: and its opposite en'd bearing against the flange 15.' As disclosed in Fig. 1,'these expansible coil springs operate to normally urge the tube 11 and nail guide 13 to extended position, and at the same time serve to cushion the device during operation thereof and thereby reduce vibration to a minimum degree. In this connection, it is pointed out that the elimination of vibration is quite advantageous, as it is well known this causes operators of these hand mechanical hammers intime to develop a certain form of paralysis. Also thsesprings function to normally project the lower endpof the nailing ,element or set from the lower end of the tube 11 to engage a counter-bored plank, as shown in Fig. 1. In using the device on a flush surface suliicient pressure is exerted against the to'ol to dispose the nail guide withv in the tube 11 and allow the lower end of the latter to bear upon the surface'. l

A modificationv of the invention is illus- ,t1-ated in Fig. 5. This embodiment involves the application of the nailing attachment to an electric hammer. In -this instance the sleeve'y 7 is eliminated, and in lieu thereof I provide a thimble 28 which has one end l threadedly engaged with the upper end of the tube 9 as at 29.v A reduced exteriorly threaded nipple 30 is formed with the outer end of the thimble and is concentric to the lopening 25 in the bushing 22. The plunger 19 of the nail striking element or set is re.- ciprocable in the nipple 30, and has its upper end normally projecting above the upper end of this nipple. Thus upon threading the nip-4 with, as the upper end of the thimble 28 con-v stitutes a. stop to limit the upward movement of the nailing element. L

It is believed that the operation ofthe de- .vice will -be fully apparent to those skilled in the art, but a brief rsum thereof is given herewith. With the parts assembled as,

shown in Fig. 1, with a nail in the nailguide, the power hammer is operated to drive the hammer element 6 and "deliver successive is placed'against the work, as clearly shown in the drawings, and it will be apparent that the sections 9 and -11 will he telescoped one within the other. The stop collar 21 maybe so positioned within. the casing 9 that the lower end 12 of the casing 9 may contact with the work into which the nail is to be driven, in which event the nail-will be driven to its extreme limit as Willbe apparent. The drawings show the hammer element 6 as almost at its lowest position, that is, -just about at the osition to deliver a blow to the plunger 19.

t is desirable in the construction of the device to so arrange the upper edge of the bushing 2O that it will not be contacted -with the hammer element 6, or, if contacted at all by said element, to so arrange the bushing 20 that the upper end thereof does not receive the full force of the blow from said hammer element: This is merely for the purpose of preventing excess Ashock to the bushing 20 to preserve the life ofthe device. The stop 21 limits the travel of the plunger 19 and, con

blows to the plunger 19. While this is being l done the device, more particularly thelcasing,

the inventioncontemplatesthe provision of means whereby the nail may be inset a predetermined depth. This is accomplished by adjusting the stop 21 so as to vary the distance between the upperV end of the abutment 13 and the lower surface of the stop 21. By moving the stop 21 downwardly in the casing 9 it will be obvious that the distance between the upper. edge or face of the abutment 13a and the lower surface of the stop 21 is lessened and the maximum telescoping of the sections 9 and 11 is thus varied and therefore the section 9 will not contact with the work and the throw of the plunger 19`and the nail set 17 with respect to the work will be correspondingly varied.- It will be -apparent that the depths to which nails may Je driven in any desired work may be varied to suit the particular job.

lVhat is claimed is:

1. A vibratory hammer attachment comprising a plurality of telescopic elements, means for conuectmgone oit the telescoplc elements to the barrel of a vibratory hammer in coaxial relation thereto, resilient means normally projecting'the telescopic elements and constituting shock absorbinof means, and a reciprocable nail set operated by the vibratory hammer and guided by one-of the telescopic element-s and arranged to strike a nail positioned in said element.

2. An impact device comprising a plurality of telescopic members,expansible coil springs housed in certain of the telescopic members y to urge the latter to extended position, means for connecting one ofthe telescopic members to a stock, an impact element passing longitudinally through the telescopic members and movable in the smaller one of the latter, and

means for applying ilnpacts to the impact member. v

3. ln a device of the character described, a casing including a yieldable casing section,

means for attaching the casing to a vibrator-y hammer, a longitudinally adjustable stop bushing engaged with the casing, and a concentrically arranged impact transmitting element in the casing operable by the vibratory hammer and movable through the stop bushing and limited in its impact delivering movement thereby.

1. lu an impact hammer attachment, a plurality of telescopic tubes, a coupling for connecting one of the tubes to an impact hammer casing in concentric relation thereto, atubular nai] receiving guide extending centrally within the telescopic tubes, co-acting stop' flanges between the lower endof the nail guide and outermost tubular member, a washer received on the upper-end of the nail guide for centralizing the latter, and a c oil spring in each tubular member, and having their adjacent ends engaged with the washer.

5,. In combination with a power hammer, a nail driving attachment therefor comprising a guide resiliently supported in one of said members, and a nail set working in said telescopic members and guided by said guide.

7. A device of the'kind described comprising a casing for engaging work into which a nail is to be driven and formed of telescopic sections, a nail set working in the sections, and adjustable means for varying the maximum telescoping of the sections whereby the travel of the nail set with respect to the work 1is correspondingly varied;

8. A device of the kind described com rising'a casing for engaging workinto which a nail is to be driven and formed of telescopic sections, a nail set working in the sections, an abutment supported by one section, and means in the other section adapted to contact with said abutment for limiting the telescoping of said sections, said means being adjustable to vary the maximum telescoping of the sections whereby the travel of the nail set with respect to the work is correspondingly varied.

9. A device of the kind described comprising a easing for engaging work into which a nail is to be driven and formed of telescopic sections, a nail set working in said sections, an

'abutment in4 one section, and means in the c tions whereby the travel of the nail set with respect to the work is correspondingly varied. 10. A nail driving attachment for a power hammer comprising telescopic sections Sc-v cured to said hammer, a nail set working `through said sectlons, and means for varymg the telescoping of said sections with respect to the workwith whichthe device is used whereby to vary the distance to which a nail is inset. I

11. A nail driving attachment for a power hammer comprising upper and lower telescopic sectlons secured to the hammer, an abutment in the upper section, a nail set y; working through said abutment, and an adjustable stop member in the upper section adapted to contact with the abutment at maximum telescoping of the sections whereby to limit the position of the upper section with respect to the work with which the attachment is used and to limit the throw of the Anail set with respect to said work.

12. In combination with a power hammer,

means for driving a nail to a predetermined depth comprising a casing secured to the hammer and :formed of cushioned teleseopie 5 means in said other member adapted to contact with the aforesaid abutment to limit they maximum -telescoping of said members, said ,means being adjustable whereby to `vary said .maximum telescoping and to vary the movement of the nail set with respect'to the Work With which. the device is used.

In Witness whereof have hereunto set my hand.

' AMOS BROWN 

